I recommended against this before I realized that the Dalton was a 2" flush valve like the Carusoe. However, if you like the look of the Dalton, why not just order a Dalton tank?
The Dalton uses tank model number ST733 (followed by a number denoting the color: -01 cotton white; -11 colonial white, etc.) You can still find the tank out there if you do some research. I would start by seeing if my local plumbing supply house could order it for me. Figure $60-90 would be a pretty good price for the tank alone. You may end up spending a little more, though, for a special order.